No Video From Tuner - Panasonic LX600 Technical Information

No Video From Tuner

Check and see if the Tuner Activity
indicator is on RED. It is visible through
Yes
Check for the BT 30V, SUB 9V, &,
SUB5V voltages on connector AP3
Replace Tuner
of the AP board. Refer to the AP Board
test point locations on Slide 13.
Yes
Yes
Are SUB 9V
SUB 5V
OK ?
No
Replace defective Regulator and
biasing components. Reference
the power distribution diagram on
Slide 10 for location.
the holes on the cover plate.
Is the Tuner
Activity
indicator on?
No
No
Check the cathodes of D7601 & D7602
Is the
on the AP Board. Cathode of D7601
BT30V
should measure 30V. Replace defective
OK ?
component
.
20